Room temperature blue-light emitting liquid crystalline materials based on Phenanthroimidazole substituted Carbazole derivatives

2021 ◽  
Author(s):  
Vinay Kumar Sharma ◽  
Anuj Sharma ◽  
Vekata Subba Rao Ganga ◽  
Pranav Shrivastav ◽  
Priyanka A Jain ◽  
...  
Keyword(s):  
Schiff Base ◽  
Blue Light ◽  
Liquid Crystalline ◽  
Room Temperature ◽  
Light Emitting ◽  
Crystalline Materials ◽  
New Class ◽  
Blue Emitters ◽  
Liquid Crystalline Materials ◽  
Base Units

A new class of highly efficient blue emitters consisting of phenanthroimidazole-carbazole hybrid disc shaped molecules with two Schiff base units have been designed and well characterized. All the prepared materials...

Room-Temperature Columnar Liquid Crystalline Materials Based on Pyrazino[2,3-g]quinoxaline for Bright Green Organic Light-Emitting Diodes

2019 ◽  
Vol 1 (9) ◽  
pp. 1959-1969 ◽  
Author(s):  
Vinod Kumar Vishwakarma ◽  
Subrata Nath ◽  
Monika Gupta ◽  
Deepak Kumar Dubey ◽  
Sujith Sudheendran Swayamprabha ◽  
...  
Keyword(s):  
Liquid Crystalline ◽  
Room Temperature ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Crystalline Materials ◽  
Organic Light ◽  
Bright Green ◽  
Liquid Crystalline Materials

scholarly journals Metal-Free Four-Step Domino Reaction Enables Fully Controlled Non-Statistical Synthesis of Hexaarylbenzene with Six Different Aryl Groups

2021 ◽  
Author(s):  
Benedikt Grau ◽  
Maximilian Dill ◽  
Frank Hampel ◽  
Axel Kahnt ◽  
Norbert Jux ◽  
...  
Keyword(s):  
Liquid Crystalline ◽  
Diels Alder ◽  
Domino Reaction ◽  
Aromatic Rings ◽  
Light Emitting ◽  
Crystalline Materials ◽  
Metal Free ◽  
Synthetic Strategy ◽  
Starting Compound ◽  
Liquid Crystalline Materials

Hexaarylbenzene (HAB) derivatives are versatile aromatic systems playing a significant role as chromophores, liquid crystalline materials, molecular receptors, redox materials, organic light-emitting diodes and photochemical switches. Statistical synthesis of simple symmetrical HABs is known <i>via</i> low-yielding cyclotrimerization or Diels-Alder reactions. By contrast, the synthesis of more complex, asymmetrical systems, and without involvement of statistical steps, remains an unsolved problem. Here we present a generally applicable synthetic strategy to access asymmetrical HAB <i>via</i> an atom-economical and high-yielding metal-free four-step domino reaction using nitrostyrenes and <i>α,α</i>-dicyanoolefins as easily available starting materials. Resulting domino product – functionalized triarylbenzene (TAB) - can be used as a key starting compound to furnish asymmetrically substituted hexaarylbenzenes in high overall yield and without involvement of statistical steps. This straightforward domino process represents a distinct approach to creating diverse and still unexplored HAB scaffolds, containing six different aromatic rings around central benzene core.

Novel photoluminescent lanthanidomesogens forming bilayer smectic phase derived from blue light emitting liquid crystalline, one ring O-donor Schiff-base ligands

Polyhedron ◽  
2011 ◽  
Vol 30 (6) ◽  
pp. 1040-1047 ◽  
Author(s):  
Chira R. Bhattacharjee ◽  
Gobinda Das ◽  
Pankaj Goswami ◽  
Paritosh Mondal ◽  
Subbarao Krishna Prasad ◽  
...  
Keyword(s):  
Schiff Base ◽  
Blue Light ◽  
Liquid Crystalline ◽  
Smectic Phase ◽  
Schiff Base Ligands ◽  
Light Emitting

scholarly journals Perhydroazulenes - A New Class of Liquid Crystalline Materials

Synlett ◽  
2011 ◽  
Vol 2011 (14) ◽  
pp. 2104-2104
Author(s):  
Henning Hopf ◽  
Peter Jones ◽  
Zakir Hussain ◽  
Rajeev Menon ◽  
Vitaly Raev ◽  
...  
Keyword(s):  
Liquid Crystalline ◽  
Crystalline Materials ◽  
New Class ◽  
Liquid Crystalline Materials

Synthesis and Stereochemical Aspects of 2,6-Disubstituted Perhydroazulenes – Core Units for a New Class of Liquid Crystalline Materials

2006 ◽  
Vol 2006 (24) ◽  
pp. 5555-5569 ◽  
Author(s):  
Zakir Hussain ◽  
Henning Hopf ◽  
Ludwig Pohl ◽  
Thomas Oeser ◽  
Axel K. Fischer ◽  
...  
Keyword(s):  
Liquid Crystalline ◽  
Crystalline Materials ◽  
New Class ◽  
Liquid Crystalline Materials

scholarly journals Metal-Free Four-Step Domino Reaction Enables Fully Controlled Non-Statistical Synthesis of Hexaarylbenzene with Six Different Aryl Groups

2021 ◽  
Author(s):  
Benedikt Grau ◽  
Maximilian Dill ◽  
Frank Hampel ◽  
Axel Kahnt ◽  
Norbert Jux ◽  
...  
Keyword(s):  
Liquid Crystalline ◽  
Diels Alder ◽  
Domino Reaction ◽  
Aromatic Rings ◽  
Light Emitting ◽  
Crystalline Materials ◽  
Metal Free ◽  
Synthetic Strategy ◽  
Starting Compound ◽  
Liquid Crystalline Materials

Hexaarylbenzene (HAB) derivatives are versatile aromatic systems playing a significant role as chromophores, liquid crystalline materials, molecular receptors, redox materials, organic light-emitting diodes and photochemical switches. Statistical synthesis of simple symmetrical HABs is known <i>via</i> low-yielding cyclotrimerization or Diels-Alder reactions. By contrast, the synthesis of more complex, asymmetrical systems, and without involvement of statistical steps, remains an unsolved problem. Here we present a generally applicable synthetic strategy to access asymmetrical HAB <i>via</i> an atom-economical and high-yielding metal-free four-step domino reaction using nitrostyrenes and <i>α,α</i>-dicyanoolefins as easily available starting materials. Resulting domino product – functionalized triarylbenzene (TAB) - can be used as a key starting compound to furnish asymmetrically substituted hexaarylbenzenes in high overall yield and without involvement of statistical steps. This straightforward domino process represents a distinct approach to creating diverse and still unexplored HAB scaffolds, containing six different aromatic rings around central benzene core.

scholarly journals Laser triggered phase transition in photothermal liquid crystals

2017 ◽  
Vol 53 (47) ◽  
pp. 6339-6342 ◽  
Author(s):  
Mathieu Ciancone ◽  
Franck Camerel
Keyword(s):  
Phase Transition ◽  
Liquid Crystalline ◽  
Room Temperature ◽  
High Temperature Phase ◽  
Pure Liquid ◽  
Temperature Phase ◽  
Spatial Control ◽  
Crystalline Materials ◽  
Temperature Phase Transition ◽  
Liquid Crystalline Materials

Laser irradiation allows rapid high temperature phase transition directly from room temperature in pure liquid crystalline materials built around photothermal cores with a high spatial control and responsivness.

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